Which of the following graded potentials will be most likely to generate an action potential?
A)a subthreshold potential
B)a suprathreshold potential
C)a hyperpolarizing potential
D)an inhibitory potential

Question

Quizplus · Accepted Answer

A suprathreshold potential is a graded potential that reaches a critical threshold, causing an action potential to fire. This is because it depolarizes the membrane potential to a level at which voltage-gated ion channels open, allowing an influx of positively charged ions and causing an action potential to be generated. A subthreshold potential, hyperpolarizing potential, or inhibitory potential would not reach the critical threshold necessary to initiate an action potential.

Which of the Following Graded Potentials Will Be Most Likely